There is a bunch of 'duplicate finder' apps for Windows (so I assume for every OS under the sun). It'll take you 10mins the first time, and 1 min every other ti

There is a bunch of 'duplicate finder' apps for Windows (so I assume for every OS under the sun). It'll take you 10mins the first time, and 1 min every other time. I run it every few months (or whenever I remember to do so). I don't bother for word/excel/pdf, even if there are some 20MB PDF files, a 5min 1080 shaky vid from a concert you went 5 years ago is a far worthier target for your time.